A glue record is a helper recod, that logically belongs to another zone.

Multiple A records can point to a single IP address.

A client will only accept authoritative answers.

Tick all valid resource records types!

A name server will not update cached records if the serial number of the cached entry is still the same.

The private KSK and ZSK are provided via a DNSKEY resource record.

IPv6 is supported in DNS, but there are no IPv6 reverse lookups yet.

Forward- and Reverse Lookups must always consistently point to each other.

Imagine the real Internet: You are using a client system and try to open "www.hackertyper.com" in a Web browser. All caches on your client as well as on the resolver configured in your network settings are empty. Assume that DNSSEC is NOT available!

Describe which servers and zones are involved and which DNS requests/responses are exchanged in their respective order and where iterative and recursive requests are used!

NSEC and NSEC3 records are used to digitally sign non-existent records.